Drexelbrook Engineering Company

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G01F MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME 257
 
  
 
H01G CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE 165

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5760309 Ultrasonic method for material monitoringMay 24, 96Jun 02, 98[G01F]
5307678 Material level probe having crimp sealJun 07, 93May 03, 94[G01F, H01G]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5987994 Ultrasonic method for material monitoringExpiredMar 26, 98Nov 23, 99[G01F]
5049878 Two-wire compensated level measuring instrumentExpiredApr 10, 89Sep 17, 91[G08B]
4851831 Two-wire level measuring instrumentExpiredMay 29, 84Jul 25, 89[G08B]
4573040 Fail-safe instrument systemExpiredFeb 11, 85Feb 25, 86[G08B, G01R]
4485673 Two-wire level measuring instrumentExpiredMay 13, 81Dec 04, 84[G01R, G01F]
4363030 Fail-safe instrument systemExpiredNov 30, 79Dec 07, 82[G08B]

Top Inventors for This Owner

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